<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/tupian.jpeg"
             alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info"
                 @click='logout'>退出</el-button>
    </el-header>
    <!-- 页面主体区 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <!-- 侧边栏菜单区 -->
        <el-menu background-color="#333744"
                 text-color="#fff"
                 active-text-color="#409eff"
                 :unique-opened="true"
                 :collapse-transition="false"
                 :collapse="isCollapse"
                 :default-active="activePath"
                 router>
          <div class="toggle-button"
               @click="toggleCollapse">|||</div>
          <!-- 一级菜单 -->
          <el-submenu :index="item.id + ''"
                      v-for="item in menuList"
                      :key='item.id'>
            <!-- 一级菜单模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconsObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authorName}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/'+subItem.path"
                          v-for="subItem in item.children"
                          :key="subItem.id"
                          @click="saveNavState('/'+subItem.path)">
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{subItem.authorName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
        <!-- 路由占位符 -->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>

</template>
<script>
export default {
  data () {
    return {
      // 左侧菜单数据
      menuList: [
        {
          id: 125,
          order: 1,
          path: 'users',
          authorName: '用户管理',
          children: [{
            id: 110,
            authorName: '用户列表',
            path: 'users'
          }]
        },
        {
          id: 135,
          order: 1,
          path: 'quanxians',
          authorName: '权限管理',
          children: [{
            id: 120,
            authorName: '角色列表',
            path: 'roles'
          }, {
            id: 130,
            authorName: '权限列表',
            path: 'rights'
          }]
        },
        {
          id: 145,
          order: 1,
          path: 'shangpins',
          authorName: '商品管理',
          children: [{
            id: 140,
            authorName: '商品列表',
            path: 'shangpinList'
          }, {
            id: 150,
            authorName: '分类参数',
            path: 'fenleicanshu'
          }, {
            id: 160,
            authorName: '商品分类',
            path: 'shangpinfenlei'
          }]
        },
        {
          id: 155,
          order: 1,
          path: 'dingdans',
          authorName: '订单管理',
          children: [{
            id: 170,
            authorName: '订单列表',
            path: 'dingdanList'
          }]
        },
        {
          id: 165,
          order: 1,
          path: 'shujus',
          authorName: '数据统计',
          children: [{
            id: 180,
            authorName: '数据展示',
            path: 'shujuList'
          }]
        }
      ],
      // 字体图标数据
      iconsObj: {
        125: 'iconfont icon-yonghu2',
        135: 'iconfont icon-quanxian',
        145: 'iconfont icon-shangpin',
        155: 'iconfont icon-dingdan',
        165: 'iconfont icon-shujutongji'
      },
      // 是否折叠
      isCollapse: false,
      // 被激活的连接地址
      activePath: ''
    }
  },
  created () {
    // this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    // 退出功能
    logout () {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    // 获取所有菜单数据
    async getMenuList () {
      const { data: res } = await this.$http.get('menus')
      console.log(res)
      if (res.meta.status !== 200) return this.$message.error(res.meta.data)
      this.menuList = res.data
    },
    // 点击按钮切换菜单的折叠与展开
    toggleCollapse () {
      const that = this
      that.isCollapse = !that.isCollapse
    },
    // 保存连接地址
    saveNavState (activePath) {
      const that = this
      window.sessionStorage.setItem('activePath', activePath)
      that.activePath = activePath
    }
  }
}
</script>
<style scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
}
.el-header div {
  display: flex;
  align-items: center;
}
.el-header div span {
  margin-left: 15px;
}
.el-header div img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}
.el-aside {
  background-color: #333744;
}
.el-aside .el-menu {
  border-right: none;
}
.iconfont {
  margin-right: 10px;
}
.el-main {
  background-color: #eaedf1;
}
.toggle-button {
  background-color: #4a5064;
  color: #fff;
  font-size: 10px;
  line-height: 24px;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
